Spark plug gaps
 

Getting ready to fire up my motor and it occurred to me that the gap might be important. It's a 440, 8.5:1 comp ratio, pump gas, FAST EFI, MSD 6AL with a 46,000 blaster coil. What other factors am I missing and what would my gaps be? Is there a calculator of some sort? Thanks again.

plug gap.
 

since you are running a big block, EFI, msd, etc... I would start a .040. Once you get it going good and smooth. you should play with the gap size, to find that sweet spot.:thumbsup: Almost forgot, what kind of plugs you going to use?

Champion plugs as reccommended by INDY. Their motors are a little more radical than mine but they all use them. Thanks for the help Manny.

plugs
 

YA. I used autolites when I first fired my engine on the dyno. Once I got it on the car, I just played with the gap, to get it run a little smoother. Now that I am supercharged, back the plug game. lol...:thumbsup: